function init() {
	let i = 5;
	let f = 1;
	for (i; i >= 1; i--) {
		f *= i;
		console.log(f);
	}
	return f;
}
let f = init();
// console.log(f)
export { init };
// for for...in forEach every some for...of (for...of替代前几个) do...while
//break continue
